(5) If the Treasurer executes a certificate of guarantee in or to the effect of the form prescribed under subsection (11) relating to the provision to an ambulance service of financial accommodation, the due satisfaction of the financial accommodation obtained and the due payment of any interest, charges and expenses chargeable against the ambulance service in relation to the financial accommodation and the payment of the expenses of enforcing or obtaining or endeavouring to enforce or obtain such due satisfaction or payment is guaranteed by the Government of Victoria